Clock



FIG. 1 is a top, front and left side perspective view of a first embodiment of a clock showing my new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a front elevation of a second embodiment of the clock;

FIG. 4 is a front elevation of a third embodiment of the clock;

FIG. 5 is a front elevation of a fourth embodiment of the clock;

FIG. 6 is a side elevation of all four embodiments of the clock; and,

FIG. 7 is a rear elevation of all four embodiments of the clock.

The broken lines shown in FIG. 7 are for illustrative purposes only and do not form part of the claimed design. 

The ornamental design for a clock, as shown and described. 